The following figure is from AD9042 datasheet. Do you have the detail circuit
The OP27 circuit we used is just as shown below except the resistor values are
200 Ohms between pin 11 of the AD600 and pin 2 of the OP27. The feedback
resistor is 430 Ohms.
The output of the OP27 is capacitively coupled (through a 0.01uF capacitor)
into a TTE passive low pass filter with a 300kHz bandwidth (part number